As an Australian who lived in the UK for a long time and now lives in the US, it do find it funny when Americans talk about England (when referring to the entire UK), or who are surprised when they learn that the Queen is still my official Head of State. But let's face it, the whole British Empire thing is pretty confusing, especially when it comes to naming. I confess I learned a few things in the video below -- and the Venn diagram at the end is the best explanation of the whole shebang I've ever seen. (If you're in a rush, there's a screencap of the diagram after the jump.)